Auerswald COMpact 3000 analog Installation, Operation And Configuration Instructions page 536

Service and Maintenance
Factory Settings
Restore Factory Settings
Note:
If the "Power" LED remains continuously lit in red, an error has occurred.
Please contact your dealer or the manufacturer directly.
If you release the "Default" button too early (while the "Power" LED is still
blinking slowly), the PBX restarts with the update image. In this state, the
"Messages" LED lights up in green, the "Line" LED blinks green and the
"Power" LED is off. Telephoning or configuration is no longer possible. In
order to resolve this state, you need to restart the PBX. Press the "Reset"
button briefly.
If you release the "Default" button too late (the "Power" LED is no longer
flashing), restart the PBX without making any changes.
Further steps:
– Create a new configuration.
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COMpact 3000 analog/ISDN/VoIP - Firmware Version 4.0 - Version of the Manual 03 02/11